1. Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan, Tianhe, Guangzhou 510640, China
2. School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, P. R. China
3. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China